Bending machine



Dec. 22, 1931.

C. BERGES ET AL BENDING MACHINE 2 Sheets-Sheet Filed July 26, 1928 Dec. 22, 1931..

C. BERGES ET AL BENDING MACHINE Filed July 26, 1928 2 Sheets-Sheet 2 O OOOOOOOOOOOOO gimme C Bjvges M alflkl I w ll Ii Ill F1 12 Patented bee. 22, 1931,

UNITED 'sixerlzs PATENT OFF ammo. mom

Application med Jul so, 1928, Serial No.

- Ourinvention relates to an improvement in machines for bending metallic rods or bars and the like. v a

It is an object of our invention to provide a machine by means of which rods used particularly in reinforcing concrete work and the like may be easily and quickly bent into the proper shape for use.

It is desired to provide a rotating plate whereby the rod may be gripped and brought into contact with pins upon said plate and ggeans to guide saidrod so that it may be nt. It is also an object to provide a bending device of this kind wherein the work may be inserted from either of two opposite sides 1 of the device.

The invention resides in combinations of rotatable plates and contact pins thereon whereby the desired shape may be imparted to the rod with a minimum of difiiculty. g In the drawings Fig. 1 is a top plan viewpartly diagrammatic illustrating one form of our device. Fig. 2 is a similar view showing the manner in which the'rod is operated upon by the device. Fig.3 is a plan view illustrating a different type of guide member for the rod, adapted to be reversed in position. Fig. 4 is a similar construction wherein the table or support may be rotated to reverse the position of the work. Fig. 5 is a top plan view of a different embodiment of the device wherein two rotary plates are provided either one of which may be used. Fig. 6 is a similar construction in which the movement of the plate to different positions is provided for. Fig. 7 illustrates a still difl'erent embodiment of the invention. Fig. 8 is a plan view largely diagrammatic illustrating the use of two plates. Figs. 9 and 10 illustrate theuse of a slightly different embodiment of the invention. Fig. 11 is a plan view of a device embodying the inventlon in which the operating mechanism is shown. Fig. 12 is a side illustration of one oftheplates shown in Fig. 11.

In carrying out our invention we contemplate the mounting of a plate in a rotatable position upon a support or table 1, said plate 2 being provided with a central axis 33 engaging .within the bearings in the table for 895,482, and in Germanyl'une .14,

rotation. Either one or two lates may be employed as will be later described and with reference particularly to Fig. 11, a guide bar 3 is fixed in connection with the support to slidably receive a clam in member 4. In the embodiment shown 1n i 11, the bar 3 is pivoted at 5 centrally of t e table and is ada ted to swing to either side to act as a gui e; and supports 6 are provided at either end of the table in which clampin means 00 upon the bar may be received. The c amping .member 4 which slides upon the bar may be of any desired form having a slot? therein to receive the rod and hold it relative to the said clam f I 6 Each of the plates 2 may be provided with a plurality of openings 9 to receive a contact pin 10. A plurality of these pins 10 may be employed and it is to be understood that they may be spaced relative to each other so that a rod 11 may be engaged between them as the plate is rotated.

- 'These plates may be rotated by any desired means but we have shown a rack 12 slidable in a support 13 having teeth thereon to engage with teeth 14 upon the plates. The lower side of the rack is provided with gear teeth which engage with a gear 15' mounted upon a shaft 16 rotatable by means of acrank 1-7 or any other desired means. It will be obvious that when the gear 15 is rotated it will cause the rack 12 to be advanced in either direction so as to rotate the plates 2. Brackets .18 on theguide plates 13 may be provided to overhang the rod 11 and while it is being bent. In Fig. 1 the plate 2 has a contact pin 10 and a smaller pin 20 closely adjacent thereto to allow the rod to be engaged'between them.

A stop or detent 21 on the plate is provided to fix the position of the rod when it is to be rotated. The rod 11 is engaged by a sliding clamp 4 and is slidable along the guide bar 3 When a rod is engaged by the pins upon the plate and the plate rotated in the direction of the arrow there will first be formed on the end of the rod a hook 22, as shown in Fig. 2. The rod will then engage the contact pins 10 and 10' and as the rod is thus drawn toward the plate the clamping member 4 will slide hold it in position 85 alon the guide 3, thus forming the rod into the s ape shown in Fig. 2 ready to be employed in reinforced concrete work. It is to be understood that difi'erent forms are desirable and as will be later shown, different positioning of the contact pins upon the plate provide for this change of form. It is desirable to form the bend in either a righthand or lefthand direction and in order that both forms may be made with but little change. in the apparatus, in Fig. 3 wehave shown how the guide member 3?) may be secured at either end of a table 1 so as to guide the rod to the plate 2 from either side. To accomplish this, the guide member 3?) is formed with a laterally extending arm 31 thereon, said arm having a slot to receive a clamping'bolt 22. As will be seen from the dotted lines in Fig. 3, this guide may be removed and placed in a similar position at the opposite end of the table, as shown.

In Fig. 4 the same result is accomplished by placingthe plate 2 upon a rotatable table 111. The rotatable table is secured to the main table 1 by means of removable bolts 23 at each corner thereof. l Vhen these bolts are moved the table may be swung on a central axis bringing the guide arm into the dotted line position 3?; as indicated. When in this position the rotatable table may be again clamped securely to the main table.

In Fig. 5 the arrangement there shown contemplates the use of two rotatable tables 2 and 2. The guide arm 3c is rotated between the two plates on the table 10 and it is to be understood that either plate may be used as desired and in this manner either a righthand or lefthand form of rod may be produced. In Fig. 6 the dotted line position 2d indicates the use of one plate at either end of the table. The device is otherwise similar to the Figure 5 embodiment, it being contem plated, however, that the one plate 2 may be placed at either end of the table as indicated. In Fig. 7 the same idea is accomplished by rotating plate 2 upon one end of an arm 25, which is pivoted at 26 centrally of the table. This arm may be swung to position the plat. 2 at eitherend of the table, thus allowing the desired bend to be given to the rod.

Fig. 8 shows in a-diagrammatic manner the use of two plates spaced apart with the guide member 39' placed at the left of the bending plates. With this arrangement the desired form ofbending given to the rod may be varied as will be obvious. In this device the operation maybe identical with that described in reference to Fig. 11 previously referred to.

In Figs. 9 and 10 the shape'of the plates 2h is varied so as to produce an oblong plate which may have pin-receiving openings 10h at desired points throughout the length of the plate. By the use of this plate which is rotatable about its center as are the other plates, different shapes may be imparted to the rods and in Fig. 9 the position of the rod at the beginning of the operation is shown. In Fig. 10 the plate has been rotated through approximately 180, giving a desired shape to the rod 11.

The manner in which the rods are bent by the use of our apparatus will be clear from the description already given. By the use of this apparatus it is possible to adjust the position of the contact pins upon the plates and introduce the rod into correct position thereon and then bend it to the desired form in a short time and with a minimum of manipulation.

What we claim is new is:

1. A bending machine including a rotatable plate, means thereon to grip a rod when said plate is rotated, contact pins on said plate, a guide bar adjacent said plate, a rod clamp slidable on said bar, and means to rotate said plate, whereby said rod may be forced against said contact pins and bent.

2. A device such as set out in claim 1 in which a detent pin is provided upon said plate to fix the position of said rodv 3. A bending machine including a rotatable plate, contact pins on said plate adapted to engage a rod, means to guide said rod in a direct line to said plate, and means to rotate said plate whereby said pins may grip said rod and bend the same about said pins,

said guiding means being reversible to feed the rod to said plate from either side.

4; A bending machine including a rotatable plate, contact pins on said plate adapted to engage a rod, means to guide said rods in a direct line to said plate, and means to rotate said plate whereby said pins may grip said rod and bend the same about said pins, including a support adapted to swing into a plurality of positions, said plates being mounted on said support.

In testimony whereof we hereunto afiix our signatures, this 9th day of July, A. D., 1928. CARL BERGES.

WILHELM BERGES. 

